#375B5F
Closest named color: Petrol (#005F6A). oklch(44.6% 0.042 204.7), rgb(55, 91, 95).
Aa
White text reads best on this color (7.43:1).
About this color
#375B5F is a dark, muted teal or cyan. In OKLCH its lightness is 45%, its chroma 0.042 and its hue 205°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.035 away. White text reads best on it, at 7.43:1.
| Hue family | Teals and cyans |
| Lightness | dark (45%) |
| Chroma | muted (0.042) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.82:1 |
| White text | 7.43:1 |
Values
| HEX | #375B5F |
| RGB | rgb(55, 91, 95) |
| HSL | hsl(186, 27%, 29%) |
| OKLCH | oklch(44.6% 0.042 204.7) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #375B5F | 7.43:1 | AAA | Lc -90.6 | Preferred for body text |
| Black text on #375B5F | 2.82:1 | Fails | Lc 18.2 | Dividers and decoration only |
| #375B5F text on white | 7.43:1 | AAA | Lc 85.8 | Fine for body text |
| #375B5F text on black | 2.82:1 | Fails | Lc -16.3 | Dividers and decoration only |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 800.
-
Step 50
50
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E5EBEC
oklch(93.6% 0.007 208.8)
-
Step 200
200
#CFDCDD
oklch(88.5% 0.014 202.4)
-
Step 300
300
#AFC6C8
oklch(81% 0.025 203)
-
Step 400
400
#85A8AC
oklch(70.7% 0.039 204.9)
-
Step 500
500
#659398
oklch(63.2% 0.05 204.5)
-
Step 600
600
#4B7D82
oklch(55.6% 0.054 203.9)
-
Step 700
700
#3C696E
oklch(49% 0.05 204.8)
-
Step 800
800 (this color)
#375B5F
oklch(44.6% 0.042 204.7)
-
Step 900
900
#2C474A
oklch(37.8% 0.033 204.7)
-
Step 950
950
#1A292B
oklch(26.8% 0.021 206.4)
#375B5F with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #56585F | 0.042 |
| Deuteranopia (no green cones) | #4F535F | 0.039 |
| Tritanopia (no blue cones) | #265E5C | 0.020 |
| Achromatopsia (no color) | #555555 | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #375B5F
#375B5F
oklch(44.6% 0.042 204.7)
- #6A4B48
#6A4B48
oklch(44.6% 0.043 25.2)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #375B5F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.035
- Dark Green Blue #1F6357 ΔE 0.038
- Dark Slate Gray #2F4F4F ΔE 0.043
- YInMn Blue #415A77 ΔE 0.044
- Deep Teal #00555A ΔE 0.046
- Dark Aqua #05696B ΔE 0.047
- Slate #516572 ΔE 0.054
- Dusty Grape #545775 ΔE 0.059
Use #375B5F in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.